[Bug tree-optimization/91257] [7/8/9/10 Regression] Compile-time and memory-hog hog

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91257

--- Comment #6 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Jul 30 12:13:01 2019
New Revision: 273907

URL: https://gcc.gnu.org/viewcvs?rev=273907&root=gcc&view=rev
Log:
2019-07-30  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/91257
        * bitmap.h (bitmap_ior_into_and_free): Declare.
        * bitmap.c (bitmap_list_unlink_element): Add defaulted param
        whether to add the unliked element to the freelist.
        (bitmap_list_insert_element_after): Add defaulted param for
        an already allocated element.
        (bitmap_ior_into_and_free): New function.
        * tree-ssa-structalias.c (condense_visit): Reduce the
        ponts-to and edge bitmaps of the SCC members in a
        logarithmic fashion rather than all to one.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/bitmap.c
    trunk/gcc/bitmap.h
    trunk/gcc/tree-ssa-structalias.c